A mysterious duo is purchasing all the rice cookers in town, messing with the balance of the retail market. The culprit is someone Arisa didn't expect to see.

Hajime, Jyugo, Uno, and Nico head to Building 5 to find out about Rock and Yamato. Jyugo and the others fall into a trap and end up in level 1 underground cell. There, they find the captured Upa and Liang. Meanwhile, Hajime is captured by Inori and is escorted to the underground cell where Samon, covered in injuries, is restrained. Samon reveals who’s behind the incident. It is no other than Enki Gokuu, the former Building 5 supervisor who became a criminal causing havoc in Nanba Prison in the past. He is also Samon’s brother.

Winning his second round by default, Ace fights Charo next. They both agree to give the battle 100%, but Ace lets their friendship get in the way. Not being able to synchronize with Horus, can Ace overcome this obstacle, or will his battle end here?